How to Find Your Turbo Part Number
The full part number on your existing turbo is the best place to start when ordering a replacement. Your vehicle model and engine details help, but there can be several turbo versions fitted to the same model.
Find the ID plate or stamped number
Let the engine cool before looking. Check the compressor housing, usually the aluminium housing on the intake side, for a small plate or a flat area with engraved details. A torch and a phone camera can help where access is tight. Gently clean away surface dirt without sanding off the markings.
Photograph the whole plate and copy every number, including the digits after a dash and any letters at the end.
- Garrett: a number may look like 721021-5006S. Keep the complete number. The turbo model and vehicle manufacturer's part number are also useful.
- BorgWarner / KKK / Schwitzer: look for the BorgWarner part number as well as the vehicle manufacturer's number. The serial number identifies the individual unit, so send the whole plate rather than one line.
Part number or casting number?
Raised numbers cast into a housing can describe the casting, material or housing size. An A/R marking describes a housing ratio. These details can help, but the same casting may be used on different turbo assemblies, so they usually aren't enough to order from.
If the plate is missing or unreadable
- The vehicle make, model, year, engine size and engine code, if known
- Your registration or VIN to help check the original application
- Clear photos of the whole turbo, every visible marking, the actuator, and the inlet and outlet connections
- Details of any engine swap, turbo upgrade or previous replacement
If we need another angle or measurement, we'll ask. Checking the details before you order is easier than finding a mismatch halfway through the job.
